Electromyography or EMG is an electrodiagnostic method for measuring and reading electrical impulses within skeletal muscles. Using EMG signals from various points on the residual arm I plan to control the open and close of a prosthetic hand.
The college provided me with electrode pads to aid in my experimenting but unfortunately there were no electrode probes available. While inspecting the pads various methods to connect onto them came to mind but none ensured a sound connection that could be guaranteed each time the project required to be reset.
As part of tracking my training performance I wear a heart rate monitor. The monitor unit can be un-clipped from the strap to allow it be cleaned or change batteries. It was upon un-cliping it during the week when I noticed the electrode pins were very similar to those on the pads of which the college provided to me.
When trying the pad in the receiving end they fit perfectly. After a discussion with my grandmother about what these types of connections were it was pointed out to me that they were indeed snap fit buttons.
After purchasing a packet of them I brought them home and tested them (and throughout the development process) for continuity.
Please see below pictures of the final electrode cables. I will endeavor to better document the process of the next one I make and post it here
The packet of buttons cost €2.10 for 6, the cable and end pin were provided by the college and the solder was my own purchased from Maplins. This cable I’ve estimated to cost under a euro to make where as some of the cables I looked at purchasing could run quite costly in comparison.